Limits to male reproductive potential across mating bouts in Drosophila melanogaster
Limits to male reproductive potential across mating bouts in Drosophila melanogaster
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DOI：
10.1016/j.anbehav.2019.11.009
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发表时间：
2020-02-01
期刊：
影响因子：
2.5
通讯作者：
Saltz, Julia B.
中科院分区：
文献类型：
--
作者：
Douglas, Tracy;Anderson, Raleigh;Saltz, Julia B.
了解生殖适合度变异的来源是性选择研究的中心目标。研究调查限制男性生殖潜力的因素通常集中在有限的配偶可用性或配偶获得。这种关注往往最大限度地减少了男性生殖潜力的生理或其他限制的潜在相关性，而不是强调研究女性的这种限制。这种知识上的差距留下了关于男性生殖成功的变化如何在连续的交配中出现的问题。在这里，我们有助于弥合这一差距，通过检查男性生殖潜力在连续交配和跨时间。为了揭示男性生殖潜力的限制，以及这些限制的变化来源，我们测量了果蝇雄性的交配率和后代生产的条件下，交配限制被废除，食物丰富。即使在这些理想的条件下，我们发现在几次交配后雄性生殖潜力的明显限制。雄性在一天内交配两到五次后，额外的交配往往会导致零后代。此外，我们还发现了雄性交配的雌性数量与其所繁殖的后代数量之间的非线性关系;这些关系取决于雄性的基因型、早期生活的社会环境和最近的交配经验。这些研究结果表明，获得更多配偶的男性并不总是产生最多的后代，并且在一段时间内获得配偶非常成功的男性可能无法在随后的交配回合和天数中继续这种成功。总之，这些发现表明男性当前和未来生殖之间的权衡。更广泛地说，这些结果突出了性选择研究如何在个体的一生中扩展，以更全面地了解性选择如何塑造变异。(C)2019动物行为研究协会。由爱思唯尔有限公司出版。保留所有权利。
Understanding the sources of variation in reproductive fitness is a central goal of sexual selection research. Research investigating factors limiting male reproductive potential typically focus on limited mate availability or mate access. This focus often minimizes the potential relevance of physiological or other limitations on male reproductive potential, in contrast to the emphasis on studying such limitations in females. This gap in knowledge leaves open questions about how variation in male reproductive success emerges across successive mating bouts. Here, we contribute to bridging this gap by examining male reproductive potential across successive matings and across time. To reveal limits to male reproductive potential, and sources of variation in these limits, we measured mating rate and offspring production in Drosophila melanogaster males under conditions in which mate limitation was abrogated and food was abundant. Even under these ideal conditions, we discovered distinct limits to male reproductive potential after just a few mating bouts. After males mated two to five times on a given day, additional matings often resulted in zero progeny. Furthermore, we found nonlinear relationships between the number of females a male mated with and the number of progeny he sired; and these relationships depended on the male's genotype, early life social environment and recent mating experience. These findings suggest that males who obtain more mates do not always sire the most offspring and that males who are highly successful in obtaining mates during one time period may not be able to continue this success on subsequent mating bouts and days. Together, these findings suggest trade-offs between current and future reproduction for males. More broadly, these results highlight how sexual selection studies may be expanded across individuals' lifetimes to develop a fuller picture of how sexual selection shapes variation. (C) 2019 The Association for the Study of Animal Behaviour. Published by Elsevier Ltd. All rights reserved.